Lufia 2, an rpg for the SNES, involves two warriors falling in love and having a wedding in-game after the supposed threat is defeated. As soon as their wedding is over they throw off their wedding garbs to reveal their armor underneath and immediately go back to doing what they do. You watch a relatively long cutscene of events occurring season by season, they have a baby, etc. After a year passes their newborn is kidnapped by one of the supposed threat's lackeys, and they both, alone and together, go out to kick his ass and get their child back (Unsurprisingly the game isn't over yet, and there's a new threat bigger than the supposed one).
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And at the very end of the game, after you beat the true final bosses and save the world, the two of them die together, using the last of their strength to prevent the final boss's flying fortress from crashing into their home town where their kid is. Yes, this happens in a SNES game overshadowed by Chrono Trigger having came out earlier the same year.